I've got some sorta kinda good news. The Lumia 920 and 820 have officially showed up on Nokia US and Nokia India websites and they are listed as "COMING SOON"
And if past experiences are to be believed, we might as well see these phones hit the market before the end of october.
The last time Nokia added a phone as coming soon, it was the Lumia 900 and it was released to the public a month later, so assuming the same time frame is used in this instance, we could see the Lumia 820 and 920 hit shelves in the last week of October, this makes the rumored October 21st date seem more plausible now.
This is just a calculated guess and I will be keeping my fingers crossed!